The radiative lifetime of charged excitons in a single self-assembled quantum dot

Paul A. Dalgarno; Patrick Gillies; Jamie McFarlane; Brian D. Gerardot; Khaled Karrai; Pierre M. Petroff; Ian Galbraith; Richard J. Warburton

doi:10.1063/1.2730276

The radiative lifetime of charged excitons in a single self-assembled quantum dot

Paul A. Dalgarno, Patrick Gillies, Jamie McFarlane, Brian D. Gerardot, Khaled Karrai, Pierre M. Petroff, Ian Galbraith, Richard J. Warburton

School of Engineering & Physical Sciences

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The small physical size of self assembled quantum dots gives rise to pronounced Coulomb interactions within the dots. By studying different excitons in the same quantum dot we show that the Coulomb interactions significantly alter the radiative recombination lifetime. The lifetime changes are larger upon charging from the neutral exciton to the positively charged exciton than from charging from the neutral exciton to the negatively charged exciton. This is attributed to a frozen electron wavefunction and a non-frozen hole wavefunction, leading to a non-perturbative hole-hole Coulomb interaction. Theoretical calculations based on a path integral quantum Monte-Carlo approach show good agreement between experiment and theory. © 2007 American Institute of Physics.

Original language	English
Title of host publication	Physics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B
Editors	W Jantsch, F Schaffler
Place of Publication	MELVILLE
Publisher	American Institute of Physics
Pages	1091-1092
Number of pages	2
Volume	893
ISBN (Print)	978-0-7354-0397-0
DOIs	https://doi.org/10.1063/1.2730276
Publication status	Published - 2007
Event	28th International Conference on the Physics of Semiconductors - Vienna Duration: 24 Jul 2006 → 28 Jul 2006

Conference

Conference	28th International Conference on the Physics of Semiconductors
Abbreviated title	ICPS-28
City	Vienna
Period	24/07/06 → 28/07/06

Keywords

Coulomb interactions
Lifetime
Path integral Monte-Carlo
Quantum dot

Access to Document

10.1063/1.2730276

Cite this

Dalgarno, P. A., Gillies, P., McFarlane, J., Gerardot, B. D., Karrai, K., Petroff, P. M., Galbraith, I., & Warburton, R. J. (2007). The radiative lifetime of charged excitons in a single self-assembled quantum dot. In W. Jantsch, & F. Schaffler (Eds.), Physics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B (Vol. 893, pp. 1091-1092). American Institute of Physics. https://doi.org/10.1063/1.2730276

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title = "The radiative lifetime of charged excitons in a single self-assembled quantum dot",

abstract = "The small physical size of self assembled quantum dots gives rise to pronounced Coulomb interactions within the dots. By studying different excitons in the same quantum dot we show that the Coulomb interactions significantly alter the radiative recombination lifetime. The lifetime changes are larger upon charging from the neutral exciton to the positively charged exciton than from charging from the neutral exciton to the negatively charged exciton. This is attributed to a frozen electron wavefunction and a non-frozen hole wavefunction, leading to a non-perturbative hole-hole Coulomb interaction. Theoretical calculations based on a path integral quantum Monte-Carlo approach show good agreement between experiment and theory. {\textcopyright} 2007 American Institute of Physics.",

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author = "Dalgarno, {Paul A.} and Patrick Gillies and Jamie McFarlane and Gerardot, {Brian D.} and Khaled Karrai and Petroff, {Pierre M.} and Ian Galbraith and Warburton, {Richard J.}",

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booktitle = "Physics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B",

publisher = "American Institute of Physics",

address = "United States",

note = "28th International Conference on the Physics of Semiconductors, ICPS-28 ; Conference date: 24-07-2006 Through 28-07-2006",

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Dalgarno, PA, Gillies, P, McFarlane, J, Gerardot, BD, Karrai, K, Petroff, PM, Galbraith, I & Warburton, RJ 2007, The radiative lifetime of charged excitons in a single self-assembled quantum dot. in W Jantsch & F Schaffler (eds), Physics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B. vol. 893, American Institute of Physics, MELVILLE, pp. 1091-1092, 28th International Conference on the Physics of Semiconductors, Vienna, 24/07/06. https://doi.org/10.1063/1.2730276

The radiative lifetime of charged excitons in a single self-assembled quantum dot. / Dalgarno, Paul A.; Gillies, Patrick; McFarlane, Jamie et al.
Physics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B. ed. / W Jantsch; F Schaffler. Vol. 893 MELVILLE: American Institute of Physics, 2007. p. 1091-1092.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Dalgarno, Paul A.

AU - Gillies, Patrick

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AU - Gerardot, Brian D.

AU - Karrai, Khaled

AU - Petroff, Pierre M.

AU - Galbraith, Ian

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N2 - The small physical size of self assembled quantum dots gives rise to pronounced Coulomb interactions within the dots. By studying different excitons in the same quantum dot we show that the Coulomb interactions significantly alter the radiative recombination lifetime. The lifetime changes are larger upon charging from the neutral exciton to the positively charged exciton than from charging from the neutral exciton to the negatively charged exciton. This is attributed to a frozen electron wavefunction and a non-frozen hole wavefunction, leading to a non-perturbative hole-hole Coulomb interaction. Theoretical calculations based on a path integral quantum Monte-Carlo approach show good agreement between experiment and theory. © 2007 American Institute of Physics.

AB - The small physical size of self assembled quantum dots gives rise to pronounced Coulomb interactions within the dots. By studying different excitons in the same quantum dot we show that the Coulomb interactions significantly alter the radiative recombination lifetime. The lifetime changes are larger upon charging from the neutral exciton to the positively charged exciton than from charging from the neutral exciton to the negatively charged exciton. This is attributed to a frozen electron wavefunction and a non-frozen hole wavefunction, leading to a non-perturbative hole-hole Coulomb interaction. Theoretical calculations based on a path integral quantum Monte-Carlo approach show good agreement between experiment and theory. © 2007 American Institute of Physics.

KW - Coulomb interactions

KW - Lifetime

KW - Path integral Monte-Carlo

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BT - Physics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B

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Dalgarno PA, Gillies P, McFarlane J, Gerardot BD, Karrai K, Petroff PM et al. The radiative lifetime of charged excitons in a single self-assembled quantum dot. In Jantsch W, Schaffler F, editors, Physics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B. Vol. 893. MELVILLE: American Institute of Physics. 2007. p. 1091-1092 doi: 10.1063/1.2730276

The radiative lifetime of charged excitons in a single self-assembled quantum dot

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